• kent_eh@lemmy.ca
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    1 year ago

    Regenerative braking has more influence on battery charge in stop-and-go traffic than it does on thw highway

    • Ecksell@lemmy.one
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      1 year ago

      You beat me to it, regenerative braking is strong in modern EVs. In several of them you can one-foot drive them, meaning take your foot off the throttle pedal, and the generator(s) will start harvesting hard enough to slow the car to a stop, charging the batteries the whole time. You only need the brake to emergency stop. And if you do choose to brake, you are just harvesting even more energy.

    • semibreve42@lemmy.dupper.net
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      1 year ago

      As well, EV’s lose very little of their energy to heat or other losses between the battery and wheels unlike ICE vehicles. The result is drag plays a more significant percentage of where the energy is “going”, so the impact of higher speeds on range is greater then it is for ICE vehicles.

  • B0rax@feddit.de
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    1 year ago

    Next you tell us that they have more mileage in moderate temperatures rather than in the winter or the summer…

    • Bad_Company_Daps@lemmy.ca
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      1 year ago

      The reason this is interesting is because it’s the reverse of gas cars. Typically the best efficiency of a gas vehicle is on the highway but for EVs you get much more efficiency in local streets

      • B0rax@feddit.de
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        1 year ago

        Well that’s only true if you don’t drive fast. When you go above 120 km/h you will see that the fuel consumption increases noticeably

  • PerogiBoi@lemmy.ca
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    1 year ago

    Something about intermittent power draw vs. constant draw.

    I have the same effect on my electric dirtbike. I get a lot more mileage off-road up and down hills at 15-40km/h than I do on flat road at 70 km/h.

  • dark_stang@beehaw.org
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    1 year ago

    This is something everybody with an ev already knows. Drag is a big factor at high speeds. But under 40mph (65kph) it’s pretty negligible. If you did a constant 30mph you could probably triple your estimated range.

    With an ICE vehicle, you’re wasting a lot of energy at low speeds being inefficient. But with an electric motor, you’re always using exactly as much energy as needed to move.

  • GreatAlbatross@feddit.uk
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    1 year ago

    I’m guessing this is mostly because ICE vehicles waste more energy in town (due to braking loss, and engine inefficiency), than a problem with BEVs.

    BEVs claw back the losses in town, meaning that only the simplest inefficiencies are left (v=ir2/2 with the wind and tyre resistance, and maybe a little bit of hot components reducing efficiency).

    Those same highway inefficiencies are masked in ICE vehicles, as the efficiency is much lower during urban driving to begin with.